/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/Model/base.py
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revision 6 by bh, Tue Aug 28 15:41:52 2001 UTC revision 320 by bh, Fri Sep 13 14:21:30 2002 UTC
# Line 1  Line 1 
1  # Copyright (c) 2001 by Intevation GmbH  # Copyright (c) 2001, 2002 by Intevation GmbH
2  # Authors:  # Authors:
3  # Bernhard Herzog <[email protected]>  # Bernhard Herzog <[email protected]>
4  #  #
# Line 13  __version__ = "$Revision$" Line 13  __version__ = "$Revision$"
13    
14  from Thuban.Lib.connector import Publisher  from Thuban.Lib.connector import Publisher
15    
16  from messages import TITLE_CHANGED  from messages import TITLE_CHANGED, CHANGED
17    
18  class TitledObject:  class TitledObject:
19    
# Line 42  class Modifiable(Publisher): Line 42  class Modifiable(Publisher):
42          return self.modified          return self.modified
43    
44      def UnsetModified(self):      def UnsetModified(self):
45          """Unset the modified flag"""          """Unset the modified flag.
46    
47            If the modified flag is changed from set to inset by he call,
48            issue a CHANGED message.
49    
50            The modified flag itself is part of the state of the object so
51            some other objects such as a field in the status bar indication
52            whether e.g. the session has changed might be interested in
53            being notified when this flag has changed.
54            """
55            was_modified = self.modified
56          self.modified = 0          self.modified = 0
57            if was_modified:
58                self.issue(CHANGED)
59    
60      def changed(self, channel = None, *args):      def changed(self, channel = None, *args):
61          """Set the modified flag and issue a mesage on the given channel          """Set the modified flag and optionally issue a message
62          with arguments args. Call this method whenever anything has  
63          changed in a layer"""          The message is issued on the channel given by channel with args
64            as the arguments. If channel is None issue no message.
65    
66            Subclasses should call this method whenever anything has
67            changed.
68            """
69          self.modified = 1          self.modified = 1
70          if channel is not None:          if channel is not None:
71              apply(self.issue, (channel, args))              self.issue(channel, *args)
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